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    Biochem Biophys Res Commun. 1998 Apr 17;245(2):490-2.

    Human pigmentation phenotype: a point mutation generates nonfunctional MSH receptor.

    Source

    Division of Biological Research on Drug Dependence, Biomedical Centre, Uppsala, Sweden.

    Abstract

    alpha-Melanocyte stimulating hormone (alpha-MSH) regulates skin and hair pigmentation by modulating the activity of MSH receptor (MC1R). We have identified Arg151Cys variant of human MC1R in genomic DNA isolated from a person with red hair and light skin of type I. The Arg151Cys variant of MC1R binds to radio-labelled analogue of alpha-MSH with identical affinity as wild type MC1R but can not be stimulated to produce cyclic AMP (cAMP). The mutation Arg151Cys renders human MC1R completely nonfunctional, which explains the red hair, light skin and poor tanning ability (skin type I). This is the first report ever describing a nonfunctional MC1R isolated from a human subject.

    PMID:
    9571181
    [PubMed - indexed for MEDLINE]

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